@dbergman I just emailed you with this response, but I got in touch with the Korean team and this is what they said:
From the Korean team:
It depends on people's phone brand. Is he only havingĀ an issue with one drone or multiple drones? If multiple drones are having a problem, it might be that the phone is not supported well. If only one drone is making that issue, the CoDrone board might be broken.
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